diff --git a/libraries/AP_HAL_ChibiOS/hwdef/MatekH743/hwdef.dat b/libraries/AP_HAL_ChibiOS/hwdef/MatekH743/hwdef.dat
index 95718f2c3a..95c4f2bf7c 100644
--- a/libraries/AP_HAL_ChibiOS/hwdef/MatekH743/hwdef.dat
+++ b/libraries/AP_HAL_ChibiOS/hwdef/MatekH743/hwdef.dat
@@ -181,10 +181,10 @@ define HAL_STORAGE_SIZE 16384
 STORAGE_FLASH_PAGE 14
 
 # spi devices
-SPIDEV icm42688  SPI1 DEVID1 IMU1_CS      MODE3  2*MHZ 16*MHZ   # Clock is 100Mhz so highest clock <= 24Mhz is 100Mhz/8
+SPIDEV icm42688  SPI1 DEVID1 IMU1_CS      MODE3  1*MHZ 16*MHZ   # Clock is 100Mhz so highest clock <= 24Mhz is 100Mhz/8
 SPIDEV mpu6000   SPI1 DEVID1 IMU1_CS      MODE3  1*MHZ  4*MHZ
 SPIDEV icm20602  SPI4 DEVID1 IMU2_CS      MODE3  1*MHZ  4*MHZ
-SPIDEV icm42605  SPI4 DEVID1 IMU3_CS      MODE3  2*MHZ 16*MHZ
+SPIDEV icm42605  SPI4 DEVID1 IMU3_CS      MODE3  1*MHZ 16*MHZ
 SPIDEV osd       SPI2 DEVID4 MAX7456_CS   MODE0 10*MHZ 10*MHZ